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MOS VOLTAGE REGULATOR

  • US 3,757,200 A
  • Filed: 07/10/1972
  • Issued: 09/04/1973
  • Est. Priority Date: 07/10/1972
  • Status: Expired due to Term
First Claim
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1. A voltage regulator circuit integrated on a semiconductor substrate for regulating an external voltage supplied to a semiconductor integrated circuit comprising a resistor, a semiconductor switching device having an output circuit operatively connected in series with said resistor across said external voltage supply and having a control terminal, an output node at the junction of said resistor and said semiconductor switching device, a feedback amplifying means operatively connected between said output node and the control terminal of said semiconductor switching device and effective to increase the conductivity of said semiconductor switching device in response to an increase in the voltage level at said output node, whereby increases in the level of said external voltage supply are compensated by an increase in the voltage across said resistor, wherein said feedback amplifying means comprises a multistage circuit, each stage comprising a load device and a semiconductor switching device having an output circuit operatively connected in series with said load device and a control terminal operatively connected to the junction node at the junction between the load device and the semiconductor switching device of the previous stage.

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